dbalek commented on a change in pull request #2587: URL: https://github.com/apache/netbeans/pull/2587#discussion_r543375487
########## File path: java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/protocol/DelegateMethodGenerator.java ########## @@ -0,0 +1,210 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.netbeans.modules.java.lsp.server.protocol; + +import com.google.gson.Gson; +import com.sun.source.tree.Scope; +import com.sun.source.util.TreePath; +import com.sun.source.util.Trees; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Set; +import java.util.concurrent.CompletableFuture; +import java.util.stream.Collectors; +import javax.lang.model.element.Element; +import javax.lang.model.element.ElementKind; +import javax.lang.model.element.ExecutableElement; +import javax.lang.model.element.Modifier; +import javax.lang.model.element.TypeElement; +import javax.lang.model.element.VariableElement; +import javax.lang.model.type.DeclaredType; +import javax.lang.model.type.TypeKind; +import javax.lang.model.type.TypeMirror; +import javax.lang.model.util.ElementFilter; +import javax.lang.model.util.Elements; +import org.eclipse.lsp4j.ApplyWorkspaceEditParams; +import org.eclipse.lsp4j.CodeAction; +import org.eclipse.lsp4j.CodeActionKind; +import org.eclipse.lsp4j.CodeActionParams; +import org.eclipse.lsp4j.MessageParams; +import org.eclipse.lsp4j.MessageType; +import org.eclipse.lsp4j.TextEdit; +import org.eclipse.lsp4j.WorkspaceEdit; +import org.netbeans.api.java.source.CompilationInfo; +import org.netbeans.api.java.source.ElementUtilities; +import org.netbeans.api.java.source.JavaSource; +import org.netbeans.api.java.source.TreeUtilities; +import org.netbeans.modules.java.lsp.server.Utils; +import org.openide.filesystems.FileObject; +import org.openide.util.NbBundle; + +/** + * + * @author Dusan Balek + */ +public final class DelegateMethodGenerator extends CodeGenerator { + + public static final String GENERATE_DELEGATE_METHOD = "java.generate.delegateMethod"; + + private final Set<String> commands = Collections.singleton(GENERATE_DELEGATE_METHOD); + private final Gson gson = new Gson(); + + DelegateMethodGenerator() { + } + + @Override + @NbBundle.Messages({ + "DN_GenerateDelegateMethod=Generate Delegate Method...", + }) + public List<CodeAction> getCodeActions(CompilationInfo info, CodeActionParams params) { + List<String> only = params.getContext().getOnly(); + if (only == null || !only.contains(CodeActionKind.Source)) { + return Collections.emptyList(); + } + int offset = getOffset(info, params.getRange().getStart()); + TreePath tp = info.getTreeUtilities().pathFor(offset); + tp = info.getTreeUtilities().getPathElementOfKind(TreeUtilities.CLASS_TREE_KINDS, tp); + if (tp == null) { + return Collections.emptyList(); + } + TypeElement typeElement = (TypeElement) info.getTrees().getElement(tp); + if (typeElement == null || !typeElement.getKind().isClass()) { + return Collections.emptyList(); + } + Elements elements = info.getElements(); + Trees trees = info.getTrees(); + Scope scope = trees.getScope(tp); + List<QuickPickItem> fields = new ArrayList<>(); + TypeElement cls; + while (scope != null && (cls = scope.getEnclosingClass()) != null) { + DeclaredType type = (DeclaredType) cls.asType(); + for (VariableElement field : ElementFilter.fieldsIn(elements.getAllMembers(cls))) { + TypeMirror fieldType = field.asType(); + if (!ERROR.contentEquals(field.getSimpleName()) && !fieldType.getKind().isPrimitive() && fieldType.getKind() != TypeKind.ARRAY + && (fieldType.getKind() != TypeKind.DECLARED || ((DeclaredType)fieldType).asElement() != cls) && trees.isAccessible(scope, field, type)) { + QuickPickItem item = new QuickPickItem(createLabel(info, field)); + item.setUserData(new ElementData(field)); + fields.add(item); + } + } + scope = scope.getEnclosingScope(); + } + if (fields.isEmpty()) { + return Collections.emptyList(); + } + String uri = Utils.toUri(info.getFileObject()); + QuickPickItem typeItem = new QuickPickItem(createLabel(info, typeElement)); + typeItem.setUserData(new ElementData(typeElement)); + return Collections.singletonList(createCodeAction(Bundle.DN_GenerateDelegateMethod(), CODE_GENERATOR_KIND, GENERATE_DELEGATE_METHOD, uri, offset, typeItem, fields)); + } + + @Override + public Set<String> getCommands() { + return commands; + } + + @Override + @NbBundle.Messages({ + "DN_SelectDelegateMethodField=Select target field to generate delegates for", + }) + public CompletableFuture<Object> processCommand(NbCodeLanguageClient client, String command, List<Object> arguments) { + if (arguments.size() > 3) { + String uri = gson.fromJson(gson.toJson(arguments.get(0)), String.class); + int offset = gson.fromJson(gson.toJson(arguments.get(1)), Integer.class); + QuickPickItem type = gson.fromJson(gson.toJson(arguments.get(2)), QuickPickItem.class); + List<QuickPickItem> fields = Arrays.asList(gson.fromJson(gson.toJson(arguments.get(3)), QuickPickItem[].class)); + if (fields.size() == 1) { + selectMethods(client, uri, offset, type, fields.get(0)); + } else { + client.showQuickPick(new ShowQuickPickParams(Bundle.DN_SelectDelegateMethodField(), false, fields)).thenAccept(selected -> { + if (selected != null && !selected.isEmpty()) { + selectMethods(client, uri, offset, type, selected.get(0)); + } + }); + } + } + return CompletableFuture.completedFuture(true); + } + + @NbBundle.Messages({ + "DN_SelectDelegateMethods=Select methods to generate delegates for", + }) + private void selectMethods(NbCodeLanguageClient client, String uri, int offset, QuickPickItem type, QuickPickItem selectedField) { + try { + FileObject file = Utils.fromUri(uri); + JavaSource js = JavaSource.forFileObject(file); + js.runUserActionTask(info -> { + info.toPhase(JavaSource.Phase.RESOLVED); + TypeElement origin = (TypeElement) gson.fromJson(gson.toJson(type.getUserData()), ElementData.class).resolve(info); + VariableElement field = (VariableElement) gson.fromJson(gson.toJson(selectedField.getUserData()), ElementData.class).resolve(info); + final ElementUtilities eu = info.getElementUtilities(); Review comment: Fixed. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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